Nut and washer



F. H. SMITH.

NUT AND WASHER.

APPLICATION FILED siPT. I3. 1920.

f W4' /y providedwith interengaging FRANK H. SMITH, 0F GREENWOOD, NJISSISSIIZPI'U'l NUT AND WASm specification of Letters raient. I Patented Feb. 14., 1922.

Application led September 18, 1920. Serial No. 409,880.

To all 'whom t may con/cern.'

Be it known that I, FRANK H. SMITH, a citizen of the United States, residing at Greenwood, in the county of Leflore and State of Mississippi, have invented a new and useful Nut and Vasher, of which the following is a specification.

It is the object of this invention to provide simple means whereby a bolt or a nut Y may be prevented from turning, this result being accomplished by the use of a novel form of holding plate, the plate and the head of the bolt, or the plate and the nut being parts.

It is Within the provlnce of the disclosure to improve generally and to enhance the utility of devices of that type to which the invention appertains.

With the above and other objects in view, which will appear as the description proceeds, the invention resides inthe combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that, within the scope of what is claimed, changes in the precise embodiment of the invention shown can be made without departing from the spirit of the invention.

In the accompanying drawings Figure 1 shows in elevation, two pieces of material held together by a nut and bolt embodying the device forming the subject matter of this application; Figure -2 is a sectional view wherein parts appear in elevation; Figure 3 is a plan showing the nut; Figure 4 is a lan showing one holding plate; Figure 5 is'an elevation wherein the plate disclosed in Figure 4 is viewed edgewise; and Figure 6 is an end'view of the bolt, showing the head thereof. f

The numerals 1 and A2 denote two pieces of material held together by a bolt 3 having a head 4 provided with approximately circular seats 5. A nut 6 is threaded on the bolt 3 and is provided with seats 7. A sprin plate 8 surrounds the bolt 3 and is locate etween the nut 6 and the piece 1 ofl material. The plate 8 is of angular outlfnlie and is bent at its corners to form holdlngprongs 9 engaging the piece 1 of material, the plate having approximately circular bosses 10, the

bosses 10 being formed by distorting the plate, the bosses being adapted to cooperate with the seats 7. The bolt 3 is surrounded by a plate 11 and at'its corners is formed .prongs 12 cooperating with the piece 2 of material, the plate 11 being distorted to form bosses 14 cooperating with the seats 5 of the bolt head 4.

Whenthe nut 6 is rotated, the bosses 10 cooperate with the seats 7 and act like pawls. The plate 8 cannot turn readily, because the prongs 9 bear on the piece 1 of material. In a. similar way, the bolt 3 is prevented from rotating, owing to the cooperation between the plate 11 and the piece 2 of material. If, as is common, the shank of the bolt happens to .be square adjacent to the head 4, then the plate 11 may be omitted, since the bolt will not rotate in the absence of the plate 11. In Figure 2 of the -drawings, the nut is shown but partially seated. When the nut is rotated to a Iirm seat, the plates 11 and 8 will be pressed against the pieces 2 and 1 of material and all parts of the structure will be locked or held against relative movement.

Having thus described the invention, what is claimed is In a device of the class described, a bolt, and cooperating elements comprising a head on the bolt and a nut on the bolt, one of said cooperating lelements being rotatable and having approximately circular hemi-spherical seats on its inner surface; and a spring plate on the bolt, the plate being angular in outline and having corners which are bent to form holding prongs, the plate being distorted to form approximately circular hemispherical bosses coacting with the seats, to prevent rotation in the absence of a force suicient to disengage the bosses fromthe seats, the form of the bosses facilitating rotation, upon' the application of suilcient force. i

In testimony that I claim the foregoing as my own, I have hereto aixed my signature in the presence of two witnesses.

FRANK H. SMITH.

PHIL S JONES,

H. C. A. CoUNosn. 

